/**
 * Copyright (c) 2011-2023, James Zhan 詹波 (jfinal@126.com).
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.jfinal.template.expr.ast;

import java.lang.reflect.Method;

/**
 * MethodInfoExt 辅助实现 extension method 功能
 */
public class MethodInfoExt extends MethodInfo {

    protected Object objectOfExtensionClass;

    public MethodInfoExt(Object objectOfExtensionClass, Long key, Class<?> clazz, Method method) {
        super(key, clazz, method);
        this.objectOfExtensionClass = objectOfExtensionClass;

        // 将被 mixed 的类自身添加入参数类型数组的第一个位置
        // Class<?>[] newParaTypes = new Class<?>[paraTypes.length + 1];
        // newParaTypes[0] = clazz;	// 第一个参数就是被 mixed 的类它自己
        // System.arraycopy(paraTypes, 0, newParaTypes, 1, paraTypes.length);
        // this.paraTypes = newParaTypes;
    }

    public Object invoke(Object target, Object... args) throws ReflectiveOperationException {
        Object[] finalArgs = new Object[args.length + 1];
        finalArgs[0] = target;

        if (args.length > 0) {
            System.arraycopy(args, 0, finalArgs, 1, args.length);
        }

        if (isVarArgs) {
            return invokeVarArgsMethod(objectOfExtensionClass, finalArgs);
        } else {
            return method.invoke(objectOfExtensionClass, finalArgs);
        }
    }
}







